Submission #917820

#	Time	Username	Problem	Language	Result	Execution time	Memory
917820		KactusJack	Bank (IZhO14_bank)	C++17	100 / 100	360 ms	90820 KiB

bank

#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
using namespace std;
int n, m;
vector<int> a, b, sum, prefix;
vector<vector<int>> mem;
int dp(int i, int mask){
    if(i == n){
        return 1;
    }
    int &ret = mem[i][mask];
    if(ret != -1){
        return ret;
    }
    ret = 0;
    int rest = prefix[i] - sum[mask];
    if(rest == 0){
        ret = dp(i+1, mask);
    }
    else{
        for(int j = 0; j < m; j++){
            if(!(mask&(1<<j)) && b[j] <= rest){
                ret = max(ret, dp(i, mask^(1<<j)));
            }
        }
    }
    return ret;
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    //freopen("bank.in", "r", stdin);
    //freopen("bank.out", "w", stdout);
    cin >> n >> m;
    a = vector<int> (n);
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }
    b = vector<int> (m);
    for(int i = 0; i < m; i++){
        cin >> b[i];
    }
    prefix = vector<int> (n);
    prefix[0] = a[0];
    for(int i = 1; i < n; i++){
        prefix[i] = prefix[i-1] + a[i];
    }
    sum = vector<int> (1<<m);
    for(int mask = 0; mask < (1<<m); mask++){
        for(int i = 0; i < m; i++){
            if((mask&(1<<i))){
                sum[mask] += b[i];
            }
        }
    }
    mem = vector<vector<int>> (n, vector<int> (1<<m, -1));
    cout << (dp(0, 0) ? "YES" : "NO") << '\n';
    return 0;
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29